My TI-86 consumed the bateries too fast. 4 AAA

SOURCE: I have 2 Texas instrument

I am having the same trouble....I found this and will try it today. Hope this works...I hate to have to buy another one.

http://education.ti.com/sites/US/downloads/pdf/TIGraphingCalculatorCare.pdf

SOURCE: TI 86 No display screen

try this
http://education.ti.com/sites/US/downloads/pdf/TIGraphingCalculatorCare.pdf

SOURCE: ti graphlink

Hello,

The only TI cable that is still on sale is the TI Silverlink. It connects to the computer through a USB port. In North America you can finf them at stores that sell school supplies (Staples, Bureau en Gros, Office Depot, Grand and Toys).

Hope it helps.

SOURCE: A friend gave me a TI-86 graphing Calc. I wont turn on!!!

Hey,
The TI-86 will run without a backup battery, I had the same problem as you and then I remembered that the 86 unlike my 89ti has contrast settings that can be not visible. So take out your 86 press the on button, nothings will happen, then press the 2nd key and the up key. Repeat pressing the 2nd and up cursor over and over. I hope this helps you, pretty much all 86 problems can be fixed by yourself.

SOURCE: Send program from one TI-86 to another TI-86

First, connect the two calculators with the unit-to-unit cable.

Prepare the receiving calculator: press 2ND [LINK] F2.

Select the item to send on the sending calculator: press 2ND [LINK] F1 F2. For each program you want to send, navigate to it using the up/down arrows and press F2. Press F1 to send.